Improvement in bean thrashers and separators



C. S. HALL.

IBEAN-THRASHER AND SEPARATOR.

No.171,'724. Q Patented Jan.4,1876.

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UNITED STATES PATENT QFFICE.

CHARLES S. HALL, OF ROCHESTER, NEW Y QRK.

IMPROVEMENT IN BEAN 'I 'HRASHERS AND SEPARATORS.

Specification forming part of Letters Patent No. 171,724, dated January 4, 1876; application filed September 20, 1875.

To all whom it may concern Be it known that I, CHARLES S. HALL, of Rochester, in the county of Monroe and State of New York, have invented a new and useful Machine for Thrashiug and Cleaning Beans; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, in which- Figure l is a verticallongitudinal section of my invention. Fig. 2 is a detached perspective of a portion of the blind-slat screen.

One serious objection heretofore experienced in attempting to thrash beans or pease by machinery has been the large proportion which would unavoidably get crushed or broken. The object of this invention is to provide a machine which shall obviate this difficulty, and thoroughly thrash and clean beans or pease Without breaking or cracking the kernels; and it consists in the employment for that purpose ofa succession of thrashing cylinders and concaves of peculiar construction, elevating-belts, and pickers.

A, E, and H represent, respectively, the

sills, posts, and cross-girts of the frame; B and B, the belts; O and O, the concaves D and D, the cylinders; P and P, the pickers; N, the fan, and S the screen.

This machine is similar in its general construetion to that set forth in my patent of February 25,1873, No.136,238; but, for thrashing beans, pease, 860-, I prefer to use a tight cylinder, D, and also a tight concave, G. I have also foundv it extremely desirable, if not absolutely necessary, to employ an auxiliary or secondary cylinder, D, and'concave; 0, both of similar construction to the former, but of less radius.

All the beans thrashed out or shelled by the passage through the first or primary cylinder are discharged from the top of the primary belt B, and deposited upon the secondary belt B, and only the vines, the thrashed and the unthrashed pods are taken up by the picker P and delivered into the secondary or auxiliary concave G, where they are rethrashed by the cylinder D. The speed of this cylinder is also considerably reduced.

reason that the little spur at the end of the pods, or as often the short, husky leaf at the stem end thereof, would catch in the meshes of the screen, so asto entirely obstruct it in a'short time.

This difficultyI have successfully overcome by substituting a screen composed of slats running laterally across the machine, and arranged obliquely, as shown more clearly in Fig. 2, their lower edges being nearer the fan, so as to ofl'er no obstruction to the blast (indicated by the dotted arrows) from said fan, and, at the same time, permit the free passage of the beans (or other grain) through between them. It will also be seen that by this position of the" slats with relation to the direction of the blast, and the travel or movement of the pods and other refuse matter,

there is no possibility of pods or anything else catching or lodging thereon.

Any unthrashed fragments of pods will work through at the rear end of the screen and be conveyed, through the spout T, into the ordinary tailings-elevator, by which they are carried up into the secondary concave and rethrashed.

The front end of the shoe is pivoted centrally at J, and the rear end is suspended by the adjustable side links Q, in the usual way.

I prefer "staple teeth for the cylinders and concaves. I also preferably employ shallow troughs upon the elevating-belts B and B. I

The pickers may be dispensed with by using smaller pulleys for the upper end of the first elevating'belt to run over, to insure the delivery therefrom to the second cylinder.

What I claim as lnyinvention is- The combination, substantially as shown,

of the primary thiashing cylinder and concave D O and belt 13, with or without the 1 picker P, with the secondary or auxiliary belt B, and thrashing cylinder and concave D 0', all relatively arran aed as described, whereby the thrashed beans escape a rethrashi ng, while the imperfectly-thrashed material is subjected tosuch i'ethrashingbefore passing out of themachiue, as set forth. 1

r CHAS. S. HALL. Witnesses:

WM. S. LOUGHBOROUGH,

GEORGE B. SELDEN. 

